JP-10 fuel has directly used to lubricate transmission parts in certain type of aero-engine. However, reliability of fuel lubrication is one of the obstacles restricting its application. A partial EHL model of point contact was established to study lubricating conditions of the transmission parts in low viscosity fuel JP-10. Finite difference method was used to obtain numerical solution of this model, which was based on elastohydrodynamic lubrication theory and elastic contact theory. The lubricating property of JP-10 was studied by comparing distributions of film thickness, film pressure and contact pressure among JP-10, aero lubricant 4050 and 4109. The film thickness and pressure of JP-10 were lower than that of the other lubricants, while asperity contact pressure in JP-10 was higher. Either lubricating property or lubricating reliability of JP-10 was lower than that of common aero oils. Advanced surface processing techniques, higher rotating speed within reasonable limits and higher surface precision are conducive to formation of fluid lubricating film.